I'm pulling my unfortunately aggressive male betta out of his tank and putting him in a 10 gallon. His current tankmates are 2 gouramis--the target of his aggression--and 5 tetras. Will it be safe in his new tank to put some tetras in there, or will he start chasing them around, too?

probably chase them around cuz they are colorful and the bettta may percieve them as a threat to finding mates. but maybe you can see how it goes. the tetras will tick him off though cuz theyll probably be nipping his giant tail